反应详情

温度

-10 °C

75 g. of 2,4-diamino-6-chloropyrimidine are dissolved in 1500 ml. of ethanol at 35° C. The solution is cooled to -10° C. and a solution of 100 g. of 3-chloro-perbenzoic acid in 500 ml. of ethanol is slowly added dropwise in the course of 1 hour. The suspension is subsequently stirred at -10° C. for 7 hours and left to stand at 5° C. overnight. The suspension is neutralized with 24 g. of sodium hydroxide in 100 ml. of water. The solid material is filtered off and recrystallized from ethanol, there being obtained pure 2,4-diamino-6-chloropyrimidine-3-oxide.

1. customat 35° C
2. waitleft
3. waitto stand at 5° C. overnight
4. filtrationThe solid material is filtered off
5. customrecrystallized from ethanol, there